The team investigating the Sewol-ho ferry disaster is currently looking into summoning Yoo Byung-eon, the former chairman of Semo Group.
Prosecutors have also summoned Yoo's relatives for questioning two times and they have been summoned for a third and final time on May 8th.
In related news, Cheonghaejin Marine Chief Kim Han-sik, who is suspected of tax evasion, embezzlement and secretly working with Yoo, was questioned for a second time on Saturday.
Kim said after the session he has nothing more to say than that he is sorry.